content: /* ===========================================================
   * JFreeChart : a free chart library for the Java(tm) platform
   * ===========================================================
   *
   * (C) Copyright 2000-2012, by Object Refinery Limited and Contributors.
   *
   * Project Info:  http://www.jfree.org/jfreechart/index.html
   *
   * This library is free software; you can redistribute it and/or modify it
   * under the terms of the GNU Lesser General Public License as published by
   * the Free Software Foundation; either version 2.1 of the License, or
   * (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful, but
   * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
   * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
   * License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
   * USA.
   *
   * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. 
   * Other names may be trademarks of their respective owners.]
   *
   * ------------------
   * BarRenderer3D.java
   * ------------------
   * (C) Copyright 2001-2012, by Serge V. Grachov and Contributors.
   *
   * Original Author:  Serge V. Grachov;
   * Contributor(s):   David Gilbert (for Object Refinery Limited);
   *                   Tin Luu;
   *                   Milo Simpson;
   *                   Richard Atkinson;
   *                   Rich Unger;
   *                   Christian W. Zuckschwerdt;
   *
   * Changes
   * -------
   * 31-Oct-2001 : First version, contributed by Serge V. Grachov (DG);
   * 15-Nov-2001 : Modified to allow for null data values (DG);
   * 13-Dec-2001 : Added tooltips (DG);
   * 16-Jan-2002 : Added fix for single category or single series datasets,
   *               pointed out by Taoufik Romdhane (DG);
   * 24-May-2002 : Incorporated tooltips into chart entities (DG);
   * 11-Jun-2002 : Added check for (permitted) null info object, bug and fix
   *               reported by David Basten.  Also updated Javadocs. (DG);
   * 19-Jun-2002 : Added code to draw labels on bars (TL);
   * 26-Jun-2002 : Added bar clipping to avoid PRExceptions (DG);
   * 05-Aug-2002 : Small modification to drawCategoryItem method to support URLs
   *               for HTML image maps (RA);
   * 06-Aug-2002 : Value labels now use number formatter, thanks to Milo
   *               Simpson (DG);
   * 08-Aug-2002 : Applied fixed in bug id 592218 (DG);
   * 20-Sep-2002 : Added fix for categoryPaint by Rich Unger, and fixed errors
   *               reported by Checkstyle (DG);
   * 24-Oct-2002 : Amendments for changes in CategoryDataset interface and
   *               CategoryToolTipGenerator interface (DG);
   * 05-Nov-2002 : Replaced references to CategoryDataset with TableDataset (DG);
   * 06-Nov-2002 : Moved to the com.jrefinery.chart.renderer package (DG);
   * 28-Jan-2003 : Added an attribute to control the shading of the left and
   *               bottom walls in the plot background (DG);
   * 25-Mar-2003 : Implemented Serializable (DG);
   * 10-Apr-2003 : Removed category paint usage (DG);
   * 13-May-2003 : Renamed VerticalBarRenderer3D --> BarRenderer3D and merged with
   *               HorizontalBarRenderer3D (DG);
   * 30-Jul-2003 : Modified entity constructor (CZ);
   * 19-Aug-2003 : Implemented Cloneable and PublicCloneable (DG);
   * 07-Oct-2003 : Added renderer state (DG);
   * 08-Oct-2003 : Removed clipping (replaced with flag in CategoryPlot to
   *               control order in which the data items are processed) (DG);
   * 20-Oct-2003 : Fixed bug (outline stroke not being used for bar
   *               outlines) (DG);
   * 21-Oct-2003 : Bar width moved into CategoryItemRendererState (DG);
   * 24-Nov-2003 : Fixed bug 846324 (item labels not showing) (DG);
   * 27-Nov-2003 : Added code to respect maxBarWidth setting (DG);
   * 02-Feb-2004 : Fixed bug where 'drawBarOutline' flag is not respected (DG);
   * 10-Feb-2004 : Small change to drawItem() method to make cut-and-paste
   *               overriding easier (DG);
   * 04-Oct-2004 : Fixed bug with item label positioning when plot alignment is
   *               horizontal (DG);
   * 05-Nov-2004 : Modified drawItem() signature (DG);
   * 20-Apr-2005 : Renamed CategoryLabelGenerator
   *               --> CategoryItemLabelGenerator (DG);
   * 25-Apr-2005 : Override initialise() method to fix bug 1189642 (DG);
   * 09-Jun-2005 : Use addEntityItem from super class (DG);
   * ------------- JFREECHART 1.0.x ---------------------------------------------
   * 07-Dec-2006 : Implemented equals() override (DG);
   * 17-Jan-2007 : Fixed bug in drawDomainGridline() method (DG);
   * 03-Apr-2007 : Fixed bugs in drawBackground() method (DG);
   * 16-Oct-2007 : Fixed bug in range marker drawing (DG);
   * 19-Mar-2009 : Override for drawRangeLine() method (DG);
   * 16-Jun-2012 : Removed JCommon dependencies (DG);
   *
   */
  
  package org.jfree.chart.renderer.category;
  
  import java.awt.AlphaComposite;
  import java.awt.Color;
  import java.awt.Composite;
  import java.awt.Font;
  import java.awt.Graphics2D;
  import java.awt.Image;
  import java.awt.Paint;
  import java.awt.Stroke;
  import java.awt.geom.GeneralPath;
  import java.awt.geom.Line2D;
  import java.awt.geom.Point2D;
  import java.awt.geom.Rectangle2D;
  import java.io.IOException;
  import java.io.ObjectInputStream;
  import java.io.ObjectOutputStream;
  import java.io.Serializable;
  
  import org.jfree.chart.Effect3D;
  import org.jfree.chart.axis.CategoryAxis;
  import org.jfree.chart.axis.ValueAxis;
  import org.jfree.chart.ui.LengthAdjustmentType;
  import org.jfree.chart.ui.RectangleAnchor;
  import org.jfree.chart.ui.RectangleEdge;
  import org.jfree.chart.ui.TextAnchor;
  import org.jfree.chart.util.PaintUtilities;
  import org.jfree.chart.util.PublicCloneable;
  import org.jfree.chart.entity.EntityCollection;
  import org.jfree.chart.event.RendererChangeEvent;
  import org.jfree.chart.labels.CategoryItemLabelGenerator;
  import org.jfree.chart.labels.ItemLabelAnchor;
  import org.jfree.chart.labels.ItemLabelPosition;
  import org.jfree.chart.plot.CategoryPlot;
  import org.jfree.chart.plot.Marker;
  import org.jfree.chart.plot.Plot;
  import org.jfree.chart.plot.PlotOrientation;
  import org.jfree.chart.plot.PlotRenderingInfo;
  import org.jfree.chart.plot.ValueMarker;
  import org.jfree.chart.text.TextUtilities;
  import org.jfree.chart.util.SerialUtilities;
  import org.jfree.data.Range;
  import org.jfree.data.category.CategoryDataset;
  
  /**
   * A renderer for bars with a 3D effect, for use with the
   * {@link CategoryPlot} class.  The example shown here is generated
   * by the <code>BarChart3DDemo1.java</code> program included in the JFreeChart
   * Demo Collection:
   * <br><br>
   * <img src="../../../../../images/BarRenderer3DSample.png"
   * alt="BarRenderer3DSample.png" />
   */
  public class BarRenderer3D extends BarRenderer
          implements Effect3D, Cloneable, PublicCloneable, Serializable {
  
      /** For serialization. */
      private static final long serialVersionUID = 7686976503536003636L;
  
      /** The default x-offset for the 3D effect. */
      public static final double DEFAULT_X_OFFSET = 12.0;
  
      /** The default y-offset for the 3D effect. */
      public static final double DEFAULT_Y_OFFSET = 8.0;
  
      /** The default wall paint. */
      public static final Paint DEFAULT_WALL_PAINT = new Color(0xDD, 0xDD, 0xDD);
  
      /** The size of x-offset for the 3D effect. */
      private double xOffset;
  
      /** The size of y-offset for the 3D effect. */
      private double yOffset;
  
      /** The paint used to shade the left and lower 3D wall. */
      private transient Paint wallPaint;
  
      /**
       * Default constructor, creates a renderer with a default '3D effect'.
       */
      public BarRenderer3D() {
          this(DEFAULT_X_OFFSET, DEFAULT_Y_OFFSET);
      }
  
      /**
       * Constructs a new renderer with the specified '3D effect'.
       *
       * @param xOffset  the x-offset for the 3D effect.
       * @param yOffset  the y-offset for the 3D effect.
       */
      public BarRenderer3D(double xOffset, double yOffset) {
  
          super();
          this.xOffset = xOffset;
          this.yOffset = yOffset;
          this.wallPaint = DEFAULT_WALL_PAINT;
          // set the default item label positions
          ItemLabelPosition p1 = new ItemLabelPosition(ItemLabelAnchor.INSIDE12,
                  TextAnchor.TOP_CENTER);
          setDefaultPositiveItemLabelPosition(p1);
          ItemLabelPosition p2 = new ItemLabelPosition(ItemLabelAnchor.INSIDE12,
                  TextAnchor.TOP_CENTER);
          setDefaultNegativeItemLabelPosition(p2);
  
      }
  
      /**
       * Returns the x-offset for the 3D effect.
       *
       * @return The 3D effect.
       *
       * @see #getYOffset()
       */
      @Override
      public double getXOffset() {
          return this.xOffset;
      }
  
      /**
       * Returns the y-offset for the 3D effect.
       *
       * @return The 3D effect.
       */
      @Override
      public double getYOffset() {
          return this.yOffset;
      }
  
      /**
       * Returns the paint used to highlight the left and bottom wall in the plot
       * background.
       *
       * @return The paint.
       *
       * @see #setWallPaint(Paint)
       */
      public Paint getWallPaint() {
          return this.wallPaint;
      }
  
      /**
       * Sets the paint used to hightlight the left and bottom walls in the plot
       * background, and sends a {@link RendererChangeEvent} to all registered
       * listeners.
       *
       * @param paint  the paint (<code>null</code> not permitted).
       *
       * @see #getWallPaint()
       */
      public void setWallPaint(Paint paint) {
          if (paint == null) {
              throw new IllegalArgumentException("Null 'paint' argument.");
          }
          this.wallPaint = paint;
          fireChangeEvent();
      }
  
  
      /**
       * Initialises the renderer and returns a state object that will be passed
       * to subsequent calls to the drawItem method.  This method gets called
       * once at the start of the process of drawing a chart.
       *
       * @param g2  the graphics device.
       * @param dataArea  the area in which the data is to be plotted.
       * @param plot  the plot.
       * @param rendererIndex  the renderer index.
       * @param info  collects chart rendering information for return to caller.
       *
       * @return The renderer state.
       */
      @Override
      public CategoryItemRendererState initialise(Graphics2D g2,
                                                  Rectangle2D dataArea,
                                                  CategoryPlot plot,
                                                  int rendererIndex,
                                                  PlotRenderingInfo info) {
  
          Rectangle2D adjusted = new Rectangle2D.Double(dataArea.getX(),
                  dataArea.getY() + getYOffset(), dataArea.getWidth()
                  - getXOffset(), dataArea.getHeight() - getYOffset());
          CategoryItemRendererState state = super.initialise(g2, adjusted, plot,
                  rendererIndex, info);
          return state;
  
      }
  
      /**
       * Draws the background for the plot.
       *
       * @param g2  the graphics device.
       * @param plot  the plot.
       * @param dataArea  the area inside the axes.
       */
      @Override
      public void drawBackground(Graphics2D g2, CategoryPlot plot,
                                 Rectangle2D dataArea) {
  
          float x0 = (float) dataArea.getX();
          float x1 = x0 + (float) Math.abs(this.xOffset);
          float x3 = (float) dataArea.getMaxX();
          float x2 = x3 - (float) Math.abs(this.xOffset);
  
          float y0 = (float) dataArea.getMaxY();
          float y1 = y0 - (float) Math.abs(this.yOffset);
          float y3 = (float) dataArea.getMinY();
          float y2 = y3 + (float) Math.abs(this.yOffset);
  
          GeneralPath clip = new GeneralPath();
          clip.moveTo(x0, y0);
          clip.lineTo(x0, y2);
          clip.lineTo(x1, y3);
          clip.lineTo(x3, y3);
          clip.lineTo(x3, y1);
          clip.lineTo(x2, y0);
          clip.closePath();
  
          Composite originalComposite = g2.getComposite();
          g2.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER,
                  plot.getBackgroundAlpha()));
  
          // fill background...
          Paint backgroundPaint = plot.getBackgroundPaint();
          if (backgroundPaint != null) {
              g2.setPaint(backgroundPaint);
              g2.fill(clip);
          }
  
          GeneralPath leftWall = new GeneralPath();
          leftWall.moveTo(x0, y0);
          leftWall.lineTo(x0, y2);
          leftWall.lineTo(x1, y3);
          leftWall.lineTo(x1, y1);
          leftWall.closePath();
          g2.setPaint(getWallPaint());
          g2.fill(leftWall);
  
          GeneralPath bottomWall = new GeneralPath();
          bottomWall.moveTo(x0, y0);
          bottomWall.lineTo(x1, y1);
          bottomWall.lineTo(x3, y1);
          bottomWall.lineTo(x2, y0);
          bottomWall.closePath();
          g2.setPaint(getWallPaint());
          g2.fill(bottomWall);
  
          // highlight the background corners...
          g2.setPaint(Color.LIGHT_GRAY);
          Line2D corner = new Line2D.Double(x0, y0, x1, y1);
          g2.draw(corner);
          corner.setLine(x1, y1, x1, y3);
          g2.draw(corner);
          corner.setLine(x1, y1, x3, y1);
          g2.draw(corner);
  
          // draw background image, if there is one...
          Image backgroundImage = plot.getBackgroundImage();
          if (backgroundImage != null) {
              Rectangle2D adjusted = new Rectangle2D.Double(dataArea.getX()
                      + getXOffset(), dataArea.getY(),
                      dataArea.getWidth() - getXOffset(),
                      dataArea.getHeight() - getYOffset());
              plot.drawBackgroundImage(g2, adjusted);
          }
  
          g2.setComposite(originalComposite);
  
      }
  
      /**
       * Draws the outline for the plot.
       *
       * @param g2  the graphics device.
       * @param plot  the plot.
       * @param dataArea  the area inside the axes.
       */
      @Override
      public void drawOutline(Graphics2D g2, CategoryPlot plot,
                              Rectangle2D dataArea) {
  
          float x0 = (float) dataArea.getX();
          float x1 = x0 + (float) Math.abs(this.xOffset);
          float x3 = (float) dataArea.getMaxX();
          float x2 = x3 - (float) Math.abs(this.xOffset);
  
          float y0 = (float) dataArea.getMaxY();
          float y1 = y0 - (float) Math.abs(this.yOffset);
          float y3 = (float) dataArea.getMinY();
          float y2 = y3 + (float) Math.abs(this.yOffset);
  
          GeneralPath clip = new GeneralPath();
          clip.moveTo(x0, y0);
          clip.lineTo(x0, y2);
          clip.lineTo(x1, y3);
          clip.lineTo(x3, y3);
          clip.lineTo(x3, y1);
          clip.lineTo(x2, y0);
          clip.closePath();
  
          // put an outline around the data area...
          Stroke outlineStroke = plot.getOutlineStroke();
          Paint outlinePaint = plot.getOutlinePaint();
          if ((outlineStroke != null) && (outlinePaint != null)) {
              g2.setStroke(outlineStroke);
              g2.setPaint(outlinePaint);
              g2.draw(clip);
          }
  
      }
  
      /**
       * Draws a grid line against the domain axis.
       *
       * @param g2  the graphics device.
       * @param plot  the plot.
       * @param dataArea  the area for plotting data (not yet adjusted for any
       *                  3D effect).
       * @param value  the Java2D value at which the grid line should be drawn.
       *
       */
      @Override
      public void drawDomainGridline(Graphics2D g2,
                                     CategoryPlot plot,
                                     Rectangle2D dataArea,
                                     double value) {
  
          Line2D line1 = null;
          Line2D line2 = null;
          PlotOrientation orientation = plot.getOrientation();
          if (orientation == PlotOrientation.HORIZONTAL) {
              double y0 = value;
              double y1 = value - getYOffset();
              double x0 = dataArea.getMinX();
              double x1 = x0 + getXOffset();
              double x2 = dataArea.getMaxX();
              line1 = new Line2D.Double(x0, y0, x1, y1);
              line2 = new Line2D.Double(x1, y1, x2, y1);
          }
          else if (orientation == PlotOrientation.VERTICAL) {
              double x0 = value;
              double x1 = value + getXOffset();
              double y0 = dataArea.getMaxY();
              double y1 = y0 - getYOffset();
              double y2 = dataArea.getMinY();
              line1 = new Line2D.Double(x0, y0, x1, y1);
              line2 = new Line2D.Double(x1, y1, x1, y2);
          }
          Paint paint = plot.getDomainGridlinePaint();
          Stroke stroke = plot.getDomainGridlineStroke();
          g2.setPaint(paint != null ? paint : Plot.DEFAULT_OUTLINE_PAINT);
          g2.setStroke(stroke != null ? stroke : Plot.DEFAULT_OUTLINE_STROKE);
          g2.draw(line1);
          g2.draw(line2);
  
      }
  
      /**
       * Draws a grid line against the range axis.
       *
       * @param g2  the graphics device.
       * @param plot  the plot.
       * @param axis  the value axis.
       * @param dataArea  the area for plotting data (not yet adjusted for any
       *                  3D effect).
       * @param value  the value at which the grid line should be drawn.
       *
       */
      @Override
      public void drawRangeGridline(Graphics2D g2, CategoryPlot plot,
              ValueAxis axis, Rectangle2D dataArea, double value) {
  
          Range range = axis.getRange();
  
          if (!range.contains(value)) {
              return;
          }
  
          Rectangle2D adjusted = new Rectangle2D.Double(dataArea.getX(),
                  dataArea.getY() + getYOffset(), dataArea.getWidth()
                  - getXOffset(), dataArea.getHeight() - getYOffset());
  
          Line2D line1 = null;
          Line2D line2 = null;
          PlotOrientation orientation = plot.getOrientation();
          if (orientation == PlotOrientation.HORIZONTAL) {
              double x0 = axis.valueToJava2D(value, adjusted,
                      plot.getRangeAxisEdge());
              double x1 = x0 + getXOffset();
              double y0 = dataArea.getMaxY();
              double y1 = y0 - getYOffset();
              double y2 = dataArea.getMinY();
              line1 = new Line2D.Double(x0, y0, x1, y1);
              line2 = new Line2D.Double(x1, y1, x1, y2);
          }
          else if (orientation == PlotOrientation.VERTICAL) {
              double y0 = axis.valueToJava2D(value, adjusted,
                      plot.getRangeAxisEdge());
              double y1 = y0 - getYOffset();
              double x0 = dataArea.getMinX();
              double x1 = x0 + getXOffset();
              double x2 = dataArea.getMaxX();
              line1 = new Line2D.Double(x0, y0, x1, y1);
              line2 = new Line2D.Double(x1, y1, x2, y1);
          }
          Paint paint = plot.getRangeGridlinePaint();
          Stroke stroke = plot.getRangeGridlineStroke();
          g2.setPaint(paint != null ? paint : Plot.DEFAULT_OUTLINE_PAINT);
          g2.setStroke(stroke != null ? stroke : Plot.DEFAULT_OUTLINE_STROKE);
          g2.draw(line1);
          g2.draw(line2);
  
      }
  
      /**
       * Draws a line perpendicular to the range axis.
       *
       * @param g2  the graphics device.
       * @param plot  the plot.
       * @param axis  the value axis.
       * @param dataArea  the area for plotting data (not yet adjusted for any 3D
       *                  effect).
       * @param value  the value at which the grid line should be drawn.
       * @param paint  the paint.
       * @param stroke  the stroke.
       *
       * @see #drawRangeGridline
       *
       * @since 1.0.13
       */
      @Override
      public void drawRangeGridline(Graphics2D g2, CategoryPlot plot, ValueAxis axis,
              Rectangle2D dataArea, double value, Paint paint, Stroke stroke) {
  
          Range range = axis.getRange();
          if (!range.contains(value)) {
              return;
          }
  
          Rectangle2D adjusted = new Rectangle2D.Double(dataArea.getX(),
                  dataArea.getY() + getYOffset(), dataArea.getWidth()
                  - getXOffset(), dataArea.getHeight() - getYOffset());
  
          Line2D line1 = null;
          Line2D line2 = null;
          PlotOrientation orientation = plot.getOrientation();
          if (orientation == PlotOrientation.HORIZONTAL) {
              double x0 = axis.valueToJava2D(value, adjusted,
                      plot.getRangeAxisEdge());
              double x1 = x0 + getXOffset();
              double y0 = dataArea.getMaxY();
              double y1 = y0 - getYOffset();
              double y2 = dataArea.getMinY();
              line1 = new Line2D.Double(x0, y0, x1, y1);
              line2 = new Line2D.Double(x1, y1, x1, y2);
          }
          else if (orientation == PlotOrientation.VERTICAL) {
              double y0 = axis.valueToJava2D(value, adjusted,
                      plot.getRangeAxisEdge());
              double y1 = y0 - getYOffset();
              double x0 = dataArea.getMinX();
              double x1 = x0 + getXOffset();
              double x2 = dataArea.getMaxX();
              line1 = new Line2D.Double(x0, y0, x1, y1);
              line2 = new Line2D.Double(x1, y1, x2, y1);
          }
          g2.setPaint(paint);
          g2.setStroke(stroke);
          g2.draw(line1);
          g2.draw(line2);
  
      }
  
      /**
       * Draws a range marker.
       *
       * @param g2  the graphics device.
       * @param plot  the plot.
       * @param axis  the value axis.
       * @param marker  the marker.
       * @param dataArea  the area for plotting data (not including 3D effect).
       */
      @Override
      public void drawRangeMarker(Graphics2D g2, CategoryPlot plot, 
              ValueAxis axis, Marker marker, Rectangle2D dataArea) {
  
          Rectangle2D adjusted = new Rectangle2D.Double(dataArea.getX(),
                  dataArea.getY() + getYOffset(), dataArea.getWidth()
                  - getXOffset(), dataArea.getHeight() - getYOffset());
          if (marker instanceof ValueMarker) {
              ValueMarker vm = (ValueMarker) marker;
              double value = vm.getValue();
              Range range = axis.getRange();
              if (!range.contains(value)) {
                  return;
              }
  
              GeneralPath path = null;
              PlotOrientation orientation = plot.getOrientation();
              if (orientation == PlotOrientation.HORIZONTAL) {
                  float x = (float) axis.valueToJava2D(value, adjusted,
                          plot.getRangeAxisEdge());
                  float y = (float) adjusted.getMaxY();
                  path = new GeneralPath();
                  path.moveTo(x, y);
                  path.lineTo((float) (x + getXOffset()),
                          y - (float) getYOffset());
                  path.lineTo((float) (x + getXOffset()),
                          (float) (adjusted.getMinY() - getYOffset()));
                  path.lineTo(x, (float) adjusted.getMinY());
                  path.closePath();
              }
              else if (orientation == PlotOrientation.VERTICAL) {
                  float y = (float) axis.valueToJava2D(value, adjusted,
                          plot.getRangeAxisEdge());
                  float x = (float) dataArea.getX();
                  path = new GeneralPath();
                  path.moveTo(x, y);
                  path.lineTo(x + (float) this.xOffset, y - (float) this.yOffset);
                  path.lineTo((float) (adjusted.getMaxX() + this.xOffset),
                          y - (float) this.yOffset);
                  path.lineTo((float) (adjusted.getMaxX()), y);
                  path.closePath();
              }
              g2.setPaint(marker.getPaint());
              g2.fill(path);
              g2.setPaint(marker.getOutlinePaint());
              g2.draw(path);
  
              String label = marker.getLabel();
              RectangleAnchor anchor = marker.getLabelAnchor();
              if (label != null) {
                  Font labelFont = marker.getLabelFont();
                  g2.setFont(labelFont);
                  g2.setPaint(marker.getLabelPaint());
                  Point2D coordinates = calculateRangeMarkerTextAnchorPoint(
                          g2, orientation, dataArea, path.getBounds2D(),
                          marker.getLabelOffset(), LengthAdjustmentType.EXPAND,
                          anchor);
                  TextUtilities.drawAlignedString(label, g2,
                          (float) coordinates.getX(), (float) coordinates.getY(),
                          marker.getLabelTextAnchor());
              }
  
          }
          else {
              super.drawRangeMarker(g2, plot, axis, marker, adjusted);
              // TODO: draw the interval marker with a 3D effect
          }
      }
  
      /**
       * Draws a 3D bar to represent one data item.
       *
       * @param g2  the graphics device.
       * @param state  the renderer state.
       * @param dataArea  the area for plotting the data.
       * @param plot  the plot.
       * @param domainAxis  the domain axis.
       * @param rangeAxis  the range axis.
       * @param dataset  the dataset.
       * @param row  the row index (zero-based).
       * @param column  the column index (zero-based).
       * @param pass  the pass index.
       */
      @Override
      public void drawItem(Graphics2D g2,
                           CategoryItemRendererState state,
                           Rectangle2D dataArea,
                           CategoryPlot plot,
                           CategoryAxis domainAxis,
                           ValueAxis rangeAxis,
                           CategoryDataset dataset,
                           int row,
                           int column,
                           int pass) {
  
          // check the value we are plotting...
          Number dataValue = dataset.getValue(row, column);
          if (dataValue == null) {
              return;
          }
  
          double value = dataValue.doubleValue();
  
          Rectangle2D adjusted = new Rectangle2D.Double(dataArea.getX(),
                  dataArea.getY() + getYOffset(),
                  dataArea.getWidth() - getXOffset(),
                  dataArea.getHeight() - getYOffset());
  
          PlotOrientation orientation = plot.getOrientation();
  
          double barW0 = calculateBarW0(plot, orientation, adjusted, domainAxis,
                  state, row, column);
          double[] barL0L1 = calculateBarL0L1(value);
          if (barL0L1 == null) {
              return;  // the bar is not visible
          }
  
          RectangleEdge edge = plot.getRangeAxisEdge();
          double transL0 = rangeAxis.valueToJava2D(barL0L1[0], adjusted, edge);
          double transL1 = rangeAxis.valueToJava2D(barL0L1[1], adjusted, edge);
          double barL0 = Math.min(transL0, transL1);
          double barLength = Math.abs(transL1 - transL0);
  
          // draw the bar...
          Rectangle2D bar = null;
          if (orientation == PlotOrientation.HORIZONTAL) {
              bar = new Rectangle2D.Double(barL0, barW0, barLength,
                      state.getBarWidth());
          }
          else {
              bar = new Rectangle2D.Double(barW0, barL0, state.getBarWidth(),
                      barLength);
          }
          Paint itemPaint = getItemPaint(row, column);
          g2.setPaint(itemPaint);
          g2.fill(bar);
  
          double x0 = bar.getMinX();
          double x1 = x0 + getXOffset();
          double x2 = bar.getMaxX();
          double x3 = x2 + getXOffset();
  
          double y0 = bar.getMinY() - getYOffset();
          double y1 = bar.getMinY();
          double y2 = bar.getMaxY() - getYOffset();
          double y3 = bar.getMaxY();
  
          GeneralPath bar3dRight = null;
          GeneralPath bar3dTop = null;
          if (barLength > 0.0) {
              bar3dRight = new GeneralPath();
              bar3dRight.moveTo((float) x2, (float) y3);
              bar3dRight.lineTo((float) x2, (float) y1);
              bar3dRight.lineTo((float) x3, (float) y0);
              bar3dRight.lineTo((float) x3, (float) y2);
              bar3dRight.closePath();
  
              if (itemPaint instanceof Color) {
                  g2.setPaint(((Color) itemPaint).darker());
              }
              g2.fill(bar3dRight);
          }
  
          bar3dTop = new GeneralPath();
          bar3dTop.moveTo((float) x0, (float) y1);
          bar3dTop.lineTo((float) x1, (float) y0);
          bar3dTop.lineTo((float) x3, (float) y0);
          bar3dTop.lineTo((float) x2, (float) y1);
          bar3dTop.closePath();
          g2.fill(bar3dTop);
  
          if (isDrawBarOutline()
                  && state.getBarWidth() > BAR_OUTLINE_WIDTH_THRESHOLD) {
              g2.setStroke(getItemOutlineStroke(row, column));
              g2.setPaint(getItemOutlinePaint(row, column));
              g2.draw(bar);
              if (bar3dRight != null) {
                  g2.draw(bar3dRight);
              }
              if (bar3dTop != null) {
                  g2.draw(bar3dTop);
              }
          }
  
          CategoryItemLabelGenerator generator
              = getItemLabelGenerator(row, column);
          if (generator != null && isItemLabelVisible(row, column)) {
              drawItemLabel(g2, dataset, row, column, plot, generator, bar,
                      (value < 0.0));
          }
  
          // add an item entity, if this information is being collected
          EntityCollection entities = state.getEntityCollection();
          if (entities != null) {
              GeneralPath barOutline = new GeneralPath();
              barOutline.moveTo((float) x0, (float) y3);
              barOutline.lineTo((float) x0, (float) y1);
              barOutline.lineTo((float) x1, (float) y0);
              barOutline.lineTo((float) x3, (float) y0);
              barOutline.lineTo((float) x3, (float) y2);
              barOutline.lineTo((float) x2, (float) y3);
              barOutline.closePath();
              addItemEntity(entities, dataset, row, column, barOutline);
          }
  
      }
  
      /**
       * Tests this renderer for equality with an arbitrary object.
       *
       * @param obj  the object (<code>null</code> permitted).
       *
       * @return A boolean.
       */
      @Override
      public boolean equals(Object obj) {
          if (obj == this) {
              return true;
          }
          if (!(obj instanceof BarRenderer3D)) {
              return false;
          }
          BarRenderer3D that = (BarRenderer3D) obj;
          if (this.xOffset != that.xOffset) {
              return false;
          }
          if (this.yOffset != that.yOffset) {
              return false;
          }
          if (!PaintUtilities.equal(this.wallPaint, that.wallPaint)) {
              return false;
          }
          return super.equals(obj);
      }
  
      /**
       * Provides serialization support.
       *
       * @param stream  the output stream.
       *
       * @throws IOException  if there is an I/O error.
       */
      private void writeObject(ObjectOutputStream stream) throws IOException {
          stream.defaultWriteObject();
          SerialUtilities.writePaint(this.wallPaint, stream);
      }
  
      /**
       * Provides serialization support.
       *
       * @param stream  the input stream.
       *
       * @throws IOException  if there is an I/O error.
       * @throws ClassNotFoundException  if there is a classpath problem.
       */
      private void readObject(ObjectInputStream stream)
          throws IOException, ClassNotFoundException {
          stream.defaultReadObject();
          this.wallPaint = SerialUtilities.readPaint(stream);
      }
  
  }
  